CN103088829A - Construction method of concrete support in foundation pit - Google Patents
Construction method of concrete support in foundation pit Download PDFInfo
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- CN103088829A CN103088829A CN2013100336164A CN201310033616A CN103088829A CN 103088829 A CN103088829 A CN 103088829A CN 2013100336164 A CN2013100336164 A CN 2013100336164A CN 201310033616 A CN201310033616 A CN 201310033616A CN 103088829 A CN103088829 A CN 103088829A
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Abstract
The invention relates to underground construction class, in particular to a construction method of a concrete in a foundation pit. In the construction method, an underground continuous wall, steel templates and obligated reinforcements on the underground continuous wall are related particularly. The construction method includes at least the following steps that prefabricating the concrete support, and extension reinforcements are arranged at two ends of the concrete support; arranging the steel templates on the lower portion of the obligated reinforcements; placing the concrete support on the steel templates, the extension reinforcements and the obligated reinforcements are welded to form a back pouring concrete support connecting segment; pouring concrete inside the connecting segment under containment by the steel templates so as to enable the concrete support and the continuous wall to form an overall structure. The construction method of a concrete support in a foundation pit has the advantages that the concrete support is capable of being recycled, and the construction method is simple, convenient and quick, environment-friendly and economic. Construction cost can be reduced substantially. Meanwhile, the steel templates of the overall structure are simple in structure, quick in erection and small in occupied space of a support system of the steel templates.
Description
Technical field
The present invention relates to the underground building class, be specifically related to the job practices that in a kind of foundation ditch, concrete supports.
Background technology
Along with the increase of highrise building height, city rail circuit staggered in length and breadth, embedded depth of foundation is also along with increase.After entering the nineties; developing rapidly of China's economy; Urban Land Price rises steadily; space availability ratio improves thereupon, numerous super highrise buildings and super dark city rail circuit have occurred, and some basement buried depth is reached more than 20 meters; Foundation Pit Excavation Technique is proposed higher, tighter requirement; namely not only to guarantee the stable of side slope, and will satisfy the requirement of Deformation control, to guarantee the safety such as building, underground utilities, road around foundation ditch.
There is steel to support in foundation pit construction and two kinds of supporting forms of concrete support.in Earthwork Construction of Deep Foundation, foundation depth is often larger, the horizontal pressure force of soil-baffling structure is also larger, therefore, concrete supports and shows as horizontal pressurized is main, support different because concrete supports from steel, it has the little characteristics of distortion, add the method that adopts arrangement of reinforcement and strengthen supporting section, can improve the intensity that concrete supports, in order to can give full play to the mechanical characteristic that rigidity is large and distortion is little of material as the concrete that supports, it can guarantee basement construction and foundation construction and peripheral adjacent structure, the safety of the communal facility such as road and underground utilities, so more adopt the concrete supporting form in foundation pit construction at home, described concrete is supported on the job site and forms by integrated the building of steel form, after completing, foundation pit construction gives again dismounting.At present, the method for foundation ditch concrete supporting removal has three kinds: the one, and the demolition blasting method, the 2nd, machinery adds the manual demolition method, and the 3rd, the cutting disassembling method.After removing the concrete support by above three kinds of methods, only have the reinforcing bar in concrete to be recovered, and concrete material can't be made the best use of everything abandoned, produces larger waste, does not meet the Scientific Outlook on Development.
Therefore, those skilled in the art is badly in need of a kind of concrete braced structures and job practices thereof that can repeatedly circulate and take full advantage of.
Summary of the invention
The objective of the invention is according to above-mentioned the deficiencies in the prior art part, the job practices that in a kind of foundation ditch, concrete supports is provided, this job practices is by adopting Prefabricated Concrete to support, and at the scene it is supported integrative-structure with the welding of the reserved steel bar on diaphragm wall splicing Pouring concrete at the same time to form concrete again, with the dismounting that facilitates concrete to support, the recycling of supporting due to Prefabricated Concrete simultaneously reduces costs.
The object of the invention realizes being completed by following technical scheme:
The job practices that in a kind of foundation ditch, concrete supports, be specifically related to the reserved steel bar on diaphragm wall, steel form and described diaphragm wall, it is characterized in that comprising the steps: at least that prefabricated described concrete supports, and be provided with the extension reinforcing bar at the two ends that described concrete supports; Described steel form is set below described reserved steel bar; Described concrete is supported put to described steel form, described extension reinforcing bar and described reserved steel bar are welded to connect, to consist of after-pouring concrete support and connection section; Concreting in described linkage section under described steel form is gone along with sb. to guard him forms integrative-structure so that concrete supports with described diaphragm wall.
Described foundation pit construction cuts described linkage section after finishing, and reclaims described concrete and supports.
It is steel plate that described prefabricated concrete supports two ends, and the extension reinforcing bar that described concrete supports two ends is welded and fixed with adopting between described steel plate.
Described steel form adopts integral structure, and described integral structure is made of base plate and the web that is arranged on described base plate both sides.
Described steel form is not less than the length of described linkage section in length longitudinally.
The below of described steel form is provided with support and supports in order to support described steel form and concrete.
Advantage of the present invention is, concrete supports reusable edible, and job practices is easy fast, environmental protection and economy, but decrease construction cost; The steel template structure of integral structure is simple simultaneously, sets up fast, and its support system takes up room little.
Description of drawings
Fig. 1 is the structural representation of steel form of the present invention and support thereof;
Fig. 2 is the A-A sectional drawing of Fig. 1 in the present invention;
Fig. 3 is that in the present invention, the concrete bracing frame is located at construction schematic diagram on steel form;
Fig. 4 is the construction schematic diagram of after-pouring concrete support and connection section in the present invention;
Fig. 5 is the structural representation after in the present invention, the concrete Construction of Supporting finishes;
Fig. 6 is that in the present invention, concrete is supported on layout plan in foundation ditch.
The specific embodiment
Feature of the present invention and other correlated characteristic are described in further detail by embodiment below in conjunction with accompanying drawing, so that technician's of the same trade understanding:
As Fig. 1-6, in figure, mark 1-9 is respectively: diaphragm wall 1, steel form 2, diaphragm wall boss 3, support 4, reserved steel bar 5, extension reinforcing bar 6, concrete support 7, steel plate 8, linkage section 9.
Embodiment: as shown in Fig. 1-6, the present embodiment relates to the underground building class, is specifically related to the job practices that in a kind of foundation ditch, concrete supports, and this job practices adopts modular concrete support assembly unit and build mode, but recycled for multiple times.The concrete steps of this job practices are as follows:
1. at first near setting up respectively steel form 2 and support 4 thereof on each wall of diaphragm wall 1, steel form 2 adopts integral structures, need not splicing, specifically is made of base plate and the web that is arranged on base plate both sides;
2. thereafter the going along with sb. to guard him under support of steel form 2, be close to the wall of diaphragm wall 1 and build diaphragm wall boss 3, wherein be provided with outward extending reserved steel bar 5 on diaphragm wall boss 3;
3. the steel bar concrete according to the prefabricated suitable dimension of needs of base pit engineering supports 7 in factory, wherein the two ends of concrete support 7 are steel plate 8, and being welded with extension reinforcing bar 6 on steel plate 8, the spacing distance between each extension reinforcing bar 6 is corresponding with the spacing distance between each above-mentioned reserved steel bar 5;
4. treat the foundation ditch inner close fitting on diaphragm wall 1 wall diaphragm wall boss 3 and factory in prefabricated concrete support 7 maintenances and complete, concrete is supported 7 be transported to the foundation pit construction scene, and by crane, its two ends are shelved on steel form 2, wherein extension reinforcing bar 6 aligns respectively mutually with reserved steel bar 5, and it is in aggregates to adopt welding manner to connect;
5. support at diaphragm wall boss 3 and concrete subsequently that in space section between 7, concreting forms after-pouring concrete support and connection section 9, make diaphragm wall boss 3, linkage section 9 and concrete support 7 concrete supported beams that are consolidated into an integral body;
6. to be connected section 9 fixed maintenances are complete, remove steel form 2 and below support 4 thereof; Repeat 1.-5. to carry out in above-mentioned steps the construction of other concrete supported beam in this foundation ditch;
When 7. needing to remove concrete supported beam after whole foundation pit construction is complete, adopt cutting machine cutting concrete supported beam, the position of cutting is the pad place of the interior reserved steel bar 5 of linkage section 9 and extension reinforcing bar 6, cut complete after by crane for hoisting to ground, knock out concrete and support concrete outside 7 two ends.This moment concrete support 7 again reusable edible in next base pit engineering.
This enforcement promotes compared to the prior art speed of application greatly owing to adopting modular assembly unit to build the steel template structure of mode and integral type, and is simultaneously simple in structure, concrete supports and reusable edible, greatly reduce construction cost, and environmentally friendly, be fit to large-scale promotion.
Claims (6)
1. the job practices that in a foundation ditch, concrete supports, be specifically related to the reserved steel bar on diaphragm wall, steel form and described diaphragm wall, it is characterized in that comprising the steps: at least that prefabricated described concrete supports, and be provided with the extension reinforcing bar at the two ends that described concrete supports; Described steel form is set below described reserved steel bar; Described concrete is supported put to described steel form, described extension reinforcing bar and described reserved steel bar are welded to connect, to consist of after-pouring concrete support and connection section; Concreting in described linkage section under described steel form is gone along with sb. to guard him forms integrative-structure so that concrete supports with described diaphragm wall.
2. the job practices that in a kind of foundation ditch according to claim 1, concrete supports after it is characterized in that described foundation pit construction finishes, is cut described linkage section, reclaims described concrete and supports.
3. the job practices of a kind of concrete support according to claim 1, is characterized in that it is steel plate that described prefabricated concrete supports two ends, and the extension reinforcing bar that described concrete supports two ends is welded and fixed with adopting between described steel plate.
4. the job practices that supports of a kind of concrete according to claim 1, is characterized in that described steel form adopts integral structure, and described integral structure is made of base plate and the web that is arranged on described base plate both sides.
5. the job practices that supports of a kind of concrete according to claim 1 is characterized in that described steel form is not less than the length of described linkage section in length longitudinally.
6. the job practices of a kind of concrete support according to claim 1, is characterized in that the below of described steel form is provided with support in order to support the support of described steel form and concrete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310033616.4A CN103088829B (en) | 2013-01-30 | 2013-01-30 | The construction method that in a kind of foundation ditch, concrete supports |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310033616.4A CN103088829B (en) | 2013-01-30 | 2013-01-30 | The construction method that in a kind of foundation ditch, concrete supports |
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| CN103088829A true CN103088829A (en) | 2013-05-08 |
| CN103088829B CN103088829B (en) | 2015-08-26 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103321246A (en) * | 2013-06-14 | 2013-09-25 | 孔志坚 | Underground diaphragm wall based foundation pit construction method |
| CN114032914A (en) * | 2021-11-09 | 2022-02-11 | 中国建筑第八工程局有限公司 | Steel support and underground continuous wall connecting node and correcting die and construction method thereof |
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| CN1884722A (en) * | 2006-06-12 | 2006-12-27 | 中铁隧道勘测设计院有限公司 | Grille type connection method of rigid joint for underground continuous wall |
| CN201605661U (en) * | 2009-11-06 | 2010-10-13 | 贵阳铝镁设计研究院 | Concretion connecting structure of supporting structure and later concrete pouring beam |
| CN201972154U (en) * | 2011-02-24 | 2011-09-14 | 常州市鼎达建筑新技术有限公司 | Freely-detachable rigid inner supporting node connecting device |
| CN202017210U (en) * | 2011-03-30 | 2011-10-26 | 广东南海国际建筑设计有限公司 | Single-row internal supporting structure for basement |
| CN102704492A (en) * | 2012-06-11 | 2012-10-03 | 上海强劲地基工程股份有限公司 | Connecting structure of section steel support and concrete support, and construction method |
| CN202626998U (en) * | 2011-12-30 | 2012-12-26 | 北京工业大学 | Square steel tube lightweight concrete purlin for foundation pit protection |
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2013
- 2013-01-30 CN CN201310033616.4A patent/CN103088829B/en active Active
Patent Citations (7)
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| KR100633013B1 (en) * | 2005-05-06 | 2006-10-12 | 주식회사 스마텍엔지니어링 | Pile for retaining wall having connector bolt, connection structure and method of retaining wall |
| CN1884722A (en) * | 2006-06-12 | 2006-12-27 | 中铁隧道勘测设计院有限公司 | Grille type connection method of rigid joint for underground continuous wall |
| CN201605661U (en) * | 2009-11-06 | 2010-10-13 | 贵阳铝镁设计研究院 | Concretion connecting structure of supporting structure and later concrete pouring beam |
| CN201972154U (en) * | 2011-02-24 | 2011-09-14 | 常州市鼎达建筑新技术有限公司 | Freely-detachable rigid inner supporting node connecting device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103321246A (en) * | 2013-06-14 | 2013-09-25 | 孔志坚 | Underground diaphragm wall based foundation pit construction method |
| CN103321246B (en) * | 2013-06-14 | 2015-07-15 | 孔志坚 | Underground diaphragm wall based foundation pit construction method |
| CN114032914A (en) * | 2021-11-09 | 2022-02-11 | 中国建筑第八工程局有限公司 | Steel support and underground continuous wall connecting node and correcting die and construction method thereof |
| CN114032914B (en) * | 2021-11-09 | 2023-02-28 | 中国建筑第八工程局有限公司 | Steel support and underground continuous wall connecting node and correcting die and construction method thereof |
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| Publication number | Publication date |
|---|---|
| CN103088829B (en) | 2015-08-26 |
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